A Multi-Circular Ring CRPA for Robust GNSS Performance in an Interference and Multipath Environment

Chris Bartone and Tom Stansell

Abstract:	This paper investigates a multi-circular ring controlled reception pattern antenna (CRPA) configuration for L-Band Global Navigation Satellite Systems (GNSS). For this multi-circular ring CPRA, the antenna aperture (i.e., size) is allowed to increase to accommodate the multi-circular rings. A total of 6 rings, plus a center reference element, spaced in radial distance of ½ the GPS L1 center frequency produces 127-elements in a 1.2 meter diameter, 2D planar array configuration. Performance of the 127-element CRPA in terms of the antenna array factor is compared to the array factor performance for a 7-element CRPA (single ring with a center reference element), that is typically implemented in a 14” diameter size. The performance in terms of size, directivity, number of interference/jamming mitigation capability, beamwidth, main beam distortion, sidelobe suppression for code and carrier phase multipath mitigation, and signal-to-interference-plus-noise (SINR) will we compared. Performance in a benign and interference/jamming environment will be presented.
Published in:	Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011) September 20 - 23, 2011 Oregon Convention Center, Portland, Oregon Portland, OR
Pages:	1129 - 1139
Cite this article:	Bartone, Chris, Stansell, Tom, "A Multi-Circular Ring CRPA for Robust GNSS Performance in an Interference and Multipath Environment," Proceedings of the 24th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2011), Portland, OR, September 2011, pp. 1129-1139.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In